Colorectal cancer screening with faecal immunochemical testing, sigmoidoscopy or colonoscopy: a clinical practice guideline
                                                BMJ; 367 (), 2019                                            
                                        
                                                                                    
                                                Recent 15-year updates of sigmoidoscopy screening trials provide new evidence on the effectiveness of colorectal cancer screening. Prompted by the new evidence, we asked: “Does colorectal cancer screening make an important difference to health outcomes in individuals initiating screening at age 50 to 7...                                            
                                        
                                                                                    
                                        
                                                                                    
                                                                             
                        